Najenda: leader, alpha, strong, stylish, badass, years together with the girls = didn’t win the heart of a single one of them.
Tatsumi: a bland and generic dude (paia) who just showed up = won the heart of several girls (even the villain), and was even the last thought of multiple girls who died… ????????????
Note: I haven’t read the manga, only watched the anime, so what I said is based on what I saw there.